/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.fs;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;

import java.io.IOException;
import java.net.URI;

import static java.util.Objects.requireNonNull;

final class ForwardingFileSystemCache
        extends FileSystem.Cache
{
    private final FileSystemCache cache;

    public ForwardingFileSystemCache(FileSystemCache cache)
    {
        this.cache = requireNonNull(cache, "cache is null");
    }

    @Override
    FileSystem get(URI uri, Configuration conf)
            throws IOException
    {
        return cache.get(uri, conf);
    }

    @Override
    FileSystem getUnique(URI uri, Configuration conf)
            throws IOException
    {
        return cache.getUnique(uri, conf);
    }

    @Override
    void remove(Key ignored, FileSystem fileSystem)
    {
        if (fileSystem == null) {
            return;
        }
        cache.remove(fileSystem);
    }

    @Override
    void closeAll()
            throws IOException
    {
        cache.closeAll();
    }

    @Override
    void closeAll(boolean onlyAutomatic)
    {
        throw new UnsupportedOperationException();
    }

    @Override
    void closeAll(UserGroupInformation ugi)
    {
        throw new UnsupportedOperationException();
    }
}
